Godstone sinkhole evacuation fears

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Many sinkholes

Guardian

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Science

What are sinkholes, how are they formed and why did one appear in a Surrey street?

Summary

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79% Informative

Sinkholes are large pits that appear in the ground when the underlying rock either collapses or is washed away, dissolved in water or degraded through other processes.

Heavy rain, surface flooding and drought can all trigger sinkholes by destabilising underground cavities.

Mining, burst water mains and construction work, which affects surface drainage and the loads that ground has to bear, can also be a factor.

The Mendips, the Peak District and the northern Pennines are all hotspots.

The riskiest spot in Britain is around Ripon in North Yorkshire , which sits on gypsum.

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Informative language

Neutral language

Article tone

informal

Language

English

Language complexity